* Time Vault is banned
* Optional rule for tournament/competitive EDH games now in public testing

MTG World championships in memphis provided a great opportunity for discussion and testing, so we delayed our announcement of B&R changes until after that had passed (and we'd had time to reflect on them).

Time Vault:

This shouldn't surprise anyone. When Time Vault was unerrata'd to be Twiddle-effect friendly, it became one of the most rediculous cards in the format. Plenty of community members have commented on how game-wrecking it is, and a little extra last minute testing at Worlds showed it's just as broken as expected. Das Boot.

Public Testing of optional tournament rule:

EDH exists primarily as a fun, multiplayer format for social games among friendly playgroups. Accepted social conventions buttress the rules to achieve the kind of games local groups want. In more cutthroat environments (tournaments, some MTGO games with unknown opponents), this can break down. Rather than banning an increasing number of arbitrary cards, we're looking at other options to help make the format more stable in the face of extremely competitive deckbuilding and play styles. Because these options are departures from the norm, we've been testing them in private for the past 6 months, and now we're opening them up to further testing by the community for another 3 months. Once we gather commentary during February, we'll decide to either make these changes an official option *for tournament games* or look to other possibilities.

IF (and only if) your group fits this description and is having problems with more degenerate strategies, you can help us test them by reading this post